We don't have synonyms for air bags yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are air mass, air bag and airbags.
(n) :
Alternative spelling of airbag. [(automotive) A protective system in automobiles in which when a crash occurs, a bag containing nitrogen, formed by the explosive decomposition of sodium azide, quickly inflates in front of the driver or passenger, preventing injury to the head. Side air bags, including the back seat passengers, also prevent injury.]
(n) :
Alternative spelling of airbag. [(automotive) A protective system in automobiles in which when a crash occurs, a bag containing nitrogen, formed by the explosive decomposition of sodium azide, quickly inflates in front of the driver or passenger, preventing injury to the head. Side air bags, including the back seat passengers, also prevent injury.]